Design of a simple and low-cost solid-state ultra-fast high-voltage switch

Author:

Zhou Ziwen1ORCID,Li Yifan1ORCID,Liu Zhaojun1ORCID,Wang Runyu1ORCID,Ma Tianjie1ORCID,Jia Zezhao1ORCID,Yin Guangjia1ORCID,Moro Ramiro1ORCID,Ma Lei1ORCID

Affiliation:

1. Tianjin International Center for Nanoparticles and Nanosystems, Tianjin University , 92 Weijin Road, Nankai District, Tianjin 300072, China

Abstract

Ultra-fast high-voltage switches (UFHVSs) are a core component of time-of-flight mass spectrometers for realizing high accuracy ion acceleration, deceleration, and temporal focusing. The desirable features of high performance UFHVSs include a large range of adjustability of pulse width, a high maximum output amplitude, and minute rising and falling times. Besides the simplicity of the driver circuit, the total cost of the whole device is also critical to its practical applications. In this work, we present a low-cost and easy-fabrication 5000 V bipolar solid-state UFHVS for a high-resolution mass spectrometer. A double-pulse transformer isolates the circuit’s high- and low-voltage sides and synchronously drives series-connected cascode SiC FETs to form its push–pull topology. This scheme allows transmitting drive signals with long widths but without the magnetic saturation of the transformer. Testing results show that output pulses reach a maximum voltage of 5000 V and a width of 150 µs, with rising and falling times of 8.5 and 18.3 ns, respectively. More importantly, they have nearly no voltage decay.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

AIP Publishing

Subject

Instrumentation

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